pigeon是什么意思

A rat or pigeon might not be the obvious choice to tend to someone who is sick, but these creatures have some 26 superior skills that could help the treatment of human diseases.

2017年12月四级真题（第一套）阅读 Section A

Some, like homing pigeons can be trained to deliver messages and packages.

出自-2016年12月听力原文

In 1897, the state of Michigan passed a law prohibiting the killing of passenger pigeons but by then, no sizable flocks had been seen in the state for 10 years.

2014年高考英语全国卷1 阅读理解 阅读B 原文

In the 18th and early 19teh centuries, passenger pigeons were the largest bird population in the US.

2014年高考英语全国卷1 阅读理解 阅读B 题设

Passenger pigeons once flew over much of the united states in unbelievable numbers.

2014年高考英语全国卷1 阅读理解 阅读B 原文

Sadly the abundance of passenger pigeons may have been their undoing.

2014年高考英语全国卷1 阅读理解 阅读B 原文

The last confirmed wild pigeon in the United States was shot by a boy in pike county, Ohio, in 1900.

2014年高考英语全国卷1 阅读理解 阅读B 原文

The underlined word "undoing" probably refers to the pigeons' ruin.

2014年高考英语全国卷1 阅读理解 阅读B 题设